Skip to content
CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-53273

tee: optee: prevent use-after-free when the client exits before the supplicant

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: tee: optee: prevent use-after-free when the client exits before the supplicant Commit 70b0d6b0a199 ("tee: optee: Fix supplicant wait loop") made the client wait as killable so it can be interrupted during shutdown or after a supplicant crash. This changes the original lifetime expectations: the client task can now terminate while the supplicant is still processing its request. If the client exits first it removes the request from its queue and kfree()s it, while the request ID remains in supp->idr. A subsequent lookup on the supplicant path then dereferences freed memory, leading to a use-after-free. Serialise access to the request with supp->mutex: * Hold supp->mutex in optee_supp_recv() and optee_supp_send() while looking up and touching the request. * Let optee_supp_thrd_req() notice that the client has terminated and signal optee_supp_send() accordingly. With these changes the request cannot be freed while the supplicant still has a reference, eliminating the race.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 0180cf0373f84fff61b16f8c062553a13dd7cfca to < 416259cb5bffecaaae5f76539deb535a8c1b2c34affected
  • c0a9a948159153be145f9471435695373904ee6d to < 724d0caffd4204b46f78efe22f18f8338031c6e1affected
  • ec18520f5edc20a00c34a8c9fdd6507c355e880f to < ae847ab29ded2d7cece4d5970f0edefa4137bf2faffected
  • d61cc1a435e6894bfb0dd3370c6f765d2d12825d to < 9a0dc9279d0907b198f205a693aedf696b08145daffected
  • fd9d2d6124c293e40797a080adf8a9c237efd8b8 to < d366a01475f927402c96a3fe78bfc06b924fc87daffected
  • 70b0d6b0a199c5a3ee6c72f5e61681ed6f759612 to < d5b57bb314d79e99bebb58a53588fa11dd4dbf69affected
  • 70b0d6b0a199c5a3ee6c72f5e61681ed6f759612 to < 373152c94e57e9592b68c100e224fbd943cfd608affected
  • 70b0d6b0a199c5a3ee6c72f5e61681ed6f759612 to < 387a926ee166814611acecb960207fe2f3c4fd3eaffected
  • 3eb4911364c764572e9db4ab900a57689a54e8ceaffected
  • 21234efe2a8474a6d2d01ea9573319de7858ce44affected
  • 5.10.235 to < 5.10.259affected
  • 5.15.179 to < 5.15.210affected
  • 6.1.130 to < 6.1.176affected
  • 6.6.80 to < 6.6.143affected
  • 6.12.17 to < 6.12.94affected
  • 5.4.291 to < 5.5affected
  • 6.13.5 to < 6.14affected

Linux Linux

Default version status: affected

  • 6.14affected
  • 0 to < 6.14unaffected
  • 5.10.259 to ≤ 5.10.*unaffected
  • 5.15.210 to ≤ 5.15.*unaffected
  • 6.1.176 to ≤ 6.1.*unaffected
  • 6.6.143 to ≤ 6.6.*unaffected
  • 6.12.94 to ≤ 6.12.*unaffected
  • 6.18.36 to ≤ 6.18.*unaffected
  • 7.0.13 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References